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@einen faire @anni @ffice CHARLES lV. HERMANCE, OF SARATOGA, NEW YORK. Letters Patent No. 73,717, dated January 28, 1868.

IMPROVBD STONE-DRILLING MACHINE.

this rigemle maar tu iu these gleiten tant mit making init ut nge same.

TO ALL WHOM IT MAY CONCERN z Be it known that I, CHARLES W. HERMANCE, of Saratoga, in the county of Saratoga, and in the State of New York, have invented certain new and useful Stone-Drilling Machines; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

In the annexed drawings, making part of this specification, A represcnts the base upon which this machine f is erected, being made of any suitable material and size, and provided near one end with two ears or flanges, B B. C C represent two castmctal bars, which are placed a suitable distance apart, parallel to each other, and which form the frame of the machine. These bars are pivoted to the earsB B at their lower ends, and are held the proper distance apart by means of plates and rods for that purpose. They are also provided with long slots, which reach from near their centres to near their upper ends. Each bar has secured to' it two L-shaped metallic plates, D D, which, together with the outer faces ofthe bars, form grooves, in which fit and play two T-shaped follow-blocks, E E. Each one of these follow-blocks is provided with an arm for a pitman, and to each is pivoted a lifting-pawl, e. F F represent pitmen, whose upper ends connect to the arms on the follow-blocks, and whose lower ends are connected tothe driving-wheels G G. The wheels G G are secured upon each end of a horizontal shaft, G. The pitmen are so connected and arranged with the wheels G G and the follow-blocks E E, that one block is being lifted while the other is descending, thus, as it were, deriving a double stroke at each revolution of the shaft G. The pawls e e are curved, as represented, and have shoulders on their inner faces for lifting, as will he described, the curve on their upper ends serving to throw them out of connection when they have risen high -enough to strike against a bevelled plate, o. H represents a. metallic cross-head, with T-shaped ends. This cross-head plays up and down between the hars C C. Upon the outer face of these T-shaped ends are lugs, a, which have square shoulders formed on their under or lower ends, against which the shoulders on the liftingpawls catch, for the purpose of raising the cross-heads. These lugs take and fit into the long grooves in the bars C C, said grooves forming guides for the lugs. I represents the drill-shaft, which may be made in lany of the known and usual ways. This shaft is centrally located between the two bars C C, passing through suitable guides between said hars, and then through the centre of the cross-head II. The cross-head moves up and down with the shaft, but the shaft is allowed to turn or revolve on its axis independently of the cross-head. Secured to the shaft, and lying upon the cross-head, is a ratchet-wheel, K, the teeth of which are formed upon its upper face. A pawl, N, is pivoted to the cross-head, as seen, and with one end catches into the teeth of wheel K, to keep it from moving in but one direction. J represents a lever, upon one end of which is a collar, which surrounds the shaft I. This lever lies just over and resting upon the wheel K, has a lug upon one side of it, which is so formed that it will catch into the teeth of the wheel K, and, acting as a pawl, will cause said wheel to revolve when the lever is turned. L represents a slotted guide-bar, which is secured to the upper portion of the frame, as is seen. The outer end of lever J projects,'so that it will enter the slot in this guide-bar. The slot of the bar stands at an angle to the shaft I, so that when said shaft, with the lever J, rises and falls, a partial rotation backwards and forwards is given to the lever, thus driving the'wheel K forward all the while. A spring presses the lever towards the wheel, and causes its lng to engage its teeth and carry the wheel forward, while it allows it to `ride over the teeth, as is customary, in its backward motion, without affecting the wheel. By this arrangement the shaft I is made to revolve around and around in its work as it rises and falls. A coiled wire spring, T, surrounds the shaft I, for the purpose of forcing it downward after it has been raised a. sufficient height by the cross-head and follow-blocks. The shaft can be moved endwise in the cross-head by loosening up thc set-screw ln the collar W, so that it can be made to drill a hole as deep as required.

As has before been mentioned, this frame, composed of the bars C C and their connections, is hinged at its lower end to the lugs B B. The object of this is to set the frame so that it may drill from a horizontal to a perpendicular position, and at at any intervening angle.

To station this frame, I use a curved bar, M, which is secured to one of the ears or flanges, B, at its lower end. In this bar is a series of holes, z z, into which a pin, P, takes, said pin being seeured to the frame. A coiled wire spring surrounds this pin and forces it into the holes z 1:. When the frame is set at any suitable or desirable angle, the pin P entering one of the holes x, keeps it inthis position.

ihen the wheels Gr G are turned, the pitmen F raise and lower Athe follow-blocks E, and these blocks, through their pawls e e, reise the cross-head, acting alternately upon it. The pawls a are thrown ont of connection with the lugs on the cross-head (when the shaft I has been raised a certain distance) by means of the bevelled plates o o. As soon as the cross-head is released from the pawl, the spring '.l brings it rapidly down and with force upon thc rock which is being drilled, the lever J in the mean time, with each up-arnhdown stroke of the shaft, causing said shaft, through wheel K, to turn partially around, so as to more eH'ectually do its work. The plate u and rods V are so arranged that the bars C C may be closed up slightly, as the parts may Wear and require it.

Upon one of the plates D is made a scale, and upon the cross-head J, I use a pointer or indicator, to show the depth of the hole in drilling.

What I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement of the follow-blocks E and their lifting-pawls e with the cross-head II and its lugs a, and the plates o, for the purpose of lifting and discharging said cross-head, as is herein set forth.

2. In combination with the cross-head H and rod I, thus operated, I claim ratchet-wheel K, level' J, and

slotted guide L, all constructed as described, for the purposes set forth.

3. In combination with the f0llow-blocks, pawls, and cross-head, carrying the drill-rod, I claim the arrangement of the pitmen F F and wheels G G, all constructed and operating substantially as described.

In testimony that I claim the foregoing, I have hereunto set my hand, this 31st day of December, 1867. i CITAS. W. IIERMAICE. Witnesses:

C. M. ALEXANDER, J. M. MASON. 

